I am wondering whether it is right to say
by A and B as well as by C
why not :
by A and by B as well as by C
OR
by A and B as well as C
(either say by for all items , or for only the first )
please explain the rule of preposition & parallelism
by A and B as well as by C
why not :
by A and by B as well as by C
OR
by A and B as well as C
(either say by for all items , or for only the first )
please explain the rule of preposition & parallelism








